Open AccessPlasma Processing to Improve the Performance of the SNS Superconducting Linac
Author(s) -
M. Doléans,
Ralph Afanador,
Jeffrey Allen Ball,
Debra Barnhart,
Willem Blokland,
M. Crofford,
B DeGraff,
Steve Gold,
Brian Hannah,
M. Howell,
Sang-Ho Kim,
SungWoo Lee,
J. Mammosser,
Christopher McMahan,
T Neustadt,
Jeffrey Saunders,
Stephen Stewart,
William Herb Strong,
Puneet Tyagi,
Daniel Vandygriff,
David Vandygriff
Publication year - 2017
Publication title -
jacow
Language(s) - English
DOI - 10.18429/jacow-linac2016-we2a03
Subject(s) - linear particle accelerator , superconductivity , computer science , physics , optics , condensed matter physics , beam (structure)
An in-situ plasma processing technique has been developed at the Spallation Neutron Source (SNS) to improve the performance of the superconducting radio-frequency (SRF) cavities in operation. The technique uses a lowdensity reactive neon-oxygen plasma at room-temperature to improve the surface work function, to help removing adsorbed gases on the RF surface and to reduce its secondary emission yield. Recently, the plasma processing technique has been applied to one offline cryomodule and to two cryomodules in the linac tunnel. Improvement of the accelerating gradient has been observed in all three cryomodules.
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